(R)-BI-2852 is the isomer of BI-2852 , and can be used as an experimental control. BI-2852 is a KRAS inhibitor for the switch I/II pocket (SI/II-pocket) by structure-based agent design with nanomolar affinity. BI-2852 is mechanistically distinct from covalent KRASG12C inhibitor (binds to switch II pocket) and binds ten-fold more strongly to active KRASG12D versus KRASwt (740 nM vs 7.5 μM). BI-2852 blocks GEF, GAP, and effector interactions with KRAS, leading to inhibition of downstream signaling and an antiproliferative effect in KRAS mutant cells.
References:
[1]. Dirk Kessler, et al. Drugging all RAS isoforms with one pocket. FUTURE MEDICINAL CHEMISTRY [2]. Kessler D, et al. Drugging an undruggable pocket on KRAS. Proc Natl Acad Sci U S A. 2019 Aug 6; 116(32):15823-15829.